Bess Harris and R.G.P. Colgrove, Lawren Harris, 1969, the canvas entitled Abstraction, dated 1938 in the collection of the National Gallery,reproduced page 15 Dennis Reid, Atma Buddhi Manas: The Later Work of Lawren S. Harris, 1985, the canvas entitled Abstraction (Involvement 2), and dated circa 1939 in the collection of the National Gallery, reproduced page 32 and three preliminary drawings for this canvas reproduced page 76 Peter Larisey, Light for a Cold Land: Lawren Harriss Work and Life ~ An Interpretation, 1993, page 144, the canvas entitled Abstraction (Involvement 2), dated circa 1938 ~ 1939 reproduced page 116 and preliminary drawings for the canvas entitled Involvement 2 Santa Fe (Drawing 96) and (Drawing 97) reproduced pages 142 and 143 Pierre Landry, Canadian Art: Catalogue of the National Gallery of Canada, Volume 2 / G~K, 1994, the canvas entitled Abstraction dated 1939 reproduced page 100